[Qemu-devel] [PATCH v2 11/15] blockjob: Add 'id' parameter to 'block-job-cancel'

[Alberto Garcia <berto@igalia.com>]

This patch allows the 'block-job-cancel' command to identify the
job by either its ID or its device name. The latter becomes now
optional since the ID alone is enough to identify the job.

The HMP 'block_job_cancel' command remains unchanged.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
---
 blockdev.c           |  7 +++++--
 hmp.c                |  2 +-
 qapi/block-core.json | 10 ++++++++--
 qmp-commands.hx      |  2 +-
 4 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index bd276ee..3a0b22a 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -3776,11 +3776,14 @@ void qmp_block_job_set_speed(bool has_id, const char *id, bool has_device,
     aio_context_release(aio_context);
 }
 
-void qmp_block_job_cancel(const char *device,
+void qmp_block_job_cancel(bool has_id, const char *id,
+                          bool has_device, const char *device,
                           bool has_force, bool force, Error **errp)
 {
     AioContext *aio_context;
-    BlockJob *job = find_block_job(NULL, device, &aio_context, errp);
+    BlockJob *job = find_block_job(has_id ? id : NULL,
+                                   has_device ? device : NULL,
+                                   &aio_context, errp);
 
     if (!job) {
         return;
diff --git a/hmp.c b/hmp.c
index f498ccd..ed5a125 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1509,7 +1509,7 @@ void hmp_block_job_cancel(Monitor *mon, const QDict *qdict)
     const char *device = qdict_get_str(qdict, "device");
     bool force = qdict_get_try_bool(qdict, "force", false);
 
-    qmp_block_job_cancel(device, true, force, &error);
+    qmp_block_job_cancel(false, NULL, true, device, true, force, &error);
 
     hmp_handle_error(mon, &error);
 }
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 64038cc..38dd3f2 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1505,7 +1505,12 @@
 # operation can be started at a later time to finish copying all data from the
 # backing file.
 #
-# @device: the device name
+# The job must be identified with the @id or @device parameters, but
+# only one of them must be set.
+#
+# @id: #optional the job identifier (Since 2.7)
+#
+# @device: #optional the device name
 #
 # @force: #optional whether to allow cancellation of a paused job (default
 #         false).  Since 1.3.
@@ -1515,7 +1520,8 @@
 #
 # Since: 1.1
 ##
-{ 'command': 'block-job-cancel', 'data': { 'device': 'str', '*force': 'bool' } }
+{ 'command': 'block-job-cancel',
+  'data': { '*id': 'str', '*device': 'str', '*force': 'bool' } }
 
 ##
 # @block-job-pause:
diff --git a/qmp-commands.hx b/qmp-commands.hx
index cc70007..c7d207a 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1317,7 +1317,7 @@ EQMP
 
     {
         .name       = "block-job-cancel",
-        .args_type  = "device:B,force:b?",
+        .args_type  = "id:s?,device:B?,force:b?",
         .mhandler.cmd_new = qmp_marshal_block_job_cancel,
     },
     {
-- 
2.8.1